Traffic chaos after car overturns in Sydney Harbour Tunnel

Megan Levy and James Robertson

Major traffic jams stretching back 10 kilometres were experienced during Sydney's peak hour on Thursday when a car overturned in the Sydney Harbour Tunnel, forcing the closure of the tunnel's south-bound lanes.

The crash occurred about 7.30am and resulted in traffic queues snaking back to the Lane Cove Tunnel and to Seaforth, and delays of up to an hour on Sydney's buses on the lower north shore.

Police from the Harbourside local area command said the crash occurred when a driver who was not feeling well attempted to merge into the tunnel's left break-down lane.